Beta Persei

(bā`tə pûr`sēī'): see AlgolAlgol
, famous variable star in the constellation Perseus; Bayer designation β Persei; 1992 position R.A. 3^h07.7^m, Dec. +40°55'. Algol's variation in apparent magnitude, from 2.06 to 3.
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The orbiting pair in Beta Persei consists of a star that is a younger version of our sun, along with a hotter companion.

Tracking the flaring cycles of other stars

ALGOL (BETA PERSEI) shines in the northeast on October and November evenings.

Algol's eclipses

The fastest-acting bright variable is the eclipsing binary star Algol, or Beta Persei, shining in the northeast on September and October evenings.

An eye on Algol

Can you catch Beta Persei, the famous eclipsing variable star Algol, in one of its eclipses?

Algol in the northeast

UT 3 3:38 3 16:33 6 0:26 6 13:21 8 21:15 9 10:10 11 18:04 12 6:58 14 14:52 15 3:47 17 11:41 18 0:35 20 8:30 20 21:24 23 5:18 23 18:13 26 2:07 26 15:01 28 22:55 29 11:50 31 19:44 The bright eclipsing variable star Algol (Beta Persei) is now up in the east late at night.

Three blood drops on the Swan's wing

Every 2 days 20 hours 49 minutes, the eclipsing variable star Algol (Beta Persei) fades from magnitude 2.1 to 3.4.

A pulsing star by the dipper

Every 2 days 20 hours 49 minutes, the famous eclipsing variable star Algol (Beta Persei) fades from magnitude 2.1 to 3.4.